{"id":541,"date":"2026-05-27T01:18:35","date_gmt":"2026-05-27T01:18:35","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=541"},"modified":"2026-05-27T01:18:35","modified_gmt":"2026-05-27T01:18:35","slug":"ep-babr-round-flange-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/zh\/product\/ep-babr-round-flange-planetary-gearbox\/","title":{"rendered":"BABR\u7cfb\u5217\u9ad8\u7cbe\u5ea6\u884c\u661f\u9f7f\u8f6e\u7bb1\u2014\u2014\u5706\u5f62\u6cd5\u5170\u578b\uff08EP-BABR042\u81f3EP-BABR220\uff09"},"content":{"rendered":"

<\/main><\/p>\n
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EP-BABR Series \u2014 Round Flange High-Precision Planetary Gearbox for Servo Integration<\/h2>\n
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\"EP-BABR<\/p>\n

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\u22643′<\/div>\n
\u53cd\u51b2\uff08\u5f27\u5206\uff09<\/div>\n<\/div>\n
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200:1<\/div>\n
Max Ratio<\/div>\n<\/div>\n
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2,000<\/div>\n
Max Torque (N\u00b7m)<\/div>\n<\/div>\n
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\u226595%<\/div>\n
\u6548\u7387<\/div>\n<\/div>\n<\/div>\n

<\/p>\n


\n\u2190 \u67e5\u770b\u6240\u6709\u884c\u661f\u9f7f\u8f6e\u7bb1\u7cfb\u5217
\n<\/a><\/div>\n<\/div>\n
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\u8fd9 EP-BABR series high-precision planetary gearbox<\/strong> is the round circular-flange variant of Korea Ever-Power’s flagship EP-BAB family, designed for applications where a cylindrical bolt-circle mounting interface fits the machine structure better than the square-flange arrangement of the standard EP-BAB. Beyond the flange geometry difference, EP-BABR offers the widest ratio range in the entire EP-BAB product family: single-stage extends to 14:1 and 20:1<\/strong> \u2014 unavailable in the square-flange model \u2014 and two-stage extends all the way to 200:1<\/strong>, enabling output speeds as low as 15 rpm from a 3,000 rpm servo motor without cascading to a third reduction stage.<\/p>\n

All seven frame sizes from EP-BABR042 through EP-BABR220 maintain the same core precision specification as the square-flange series: P1 grade backlash of \u22643 arcmin single-stage<\/strong> \u548c \u22645 arcmin two-stage<\/strong>, single-stage efficiency \u226595%<\/strong>, noise below 65 dB(A)<\/strong>, and full-body hardened alloy steel gears with ANSYS-validated tooth profile corrections. The round flange is particularly favoured in Korea’s collaborative robot joint designs, hollow-shaft rotary actuators, and compact automation heads where the circular bolt pattern distributes clamping load symmetrically around the shaft centreline.<\/p>\n

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\ud83d\udd35 Round Flange Output<\/div>\n
Circular bolt-circle for symmetric clamping in tubular and hollow-shaft housings.<\/div>\n<\/div>\n
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\ud83d\udcca Up to 200:1 Ratio<\/div>\n
Widest two-stage range in the EP-BAB family \u2014 no third stage needed.<\/div>\n<\/div>\n
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\u26a1 Single-Stage to 20:1<\/div>\n
i=14 and i=20 single-stage \u2014 exclusive to BABR in the EP-BAB range.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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EP-BABR vs EP-BAB \u2014 Choosing the Right Flange Configuration<\/h2>\n

EP-BABR and EP-BAB are the same high-precision planetary gearbox internally \u2014 identical gear train, identical backlash specification, identical efficiency and noise performance. The choice between them is purely mechanical: output flange geometry and gear ratio availability.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Criterion<\/th>\nEP-BABR \u2605<\/th>\nEP-BAB<\/th>\n<\/tr>\n<\/thead>\n
Output flange shape<\/td>\nRound circular bolt-circle<\/td>\nSquare flange<\/td>\n<\/tr>\n
Best fit for<\/td>\nTubular housings, hollow shafts, rotary joints<\/td>\nStandard flange mounting plates<\/td>\n<\/tr>\n
\u5355\u7ea7\u6bd4\u7387<\/td>\n3, 4, 5, 6, 7, 8, 9, 10, 14, 20<\/strong><\/td>\n3, 4, 5, 6, 7, 8, 9, 10<\/td>\n<\/tr>\n
Two-stage max ratio<\/td>\n200:1<\/strong><\/td>\n100:1<\/td>\n<\/tr>\n
Backlash (P1)<\/td>\n\u22643 arcmin (single) \/ \u22645 arcmin (two-stage)<\/td>\n\u22643 arcmin (single) \/ \u22645 arcmin (two-stage)<\/td>\n<\/tr>\n
Efficiency \/ Noise<\/td>\n\u226595% \/ <65 dB(A)<\/td>\n\u226595% \/ <65 dB(A)<\/td>\n<\/tr>\n
\u753b\u6846\u5c3a\u5bf8<\/td>\n042 \/ 060 \/ 090 \/ 115 \/ 142 \/ 180 \/ 220<\/td>\n042 \/ 060 \/ 090 \/ 115 \/ 142 \/ 180 \/ 220<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u25b8 Decision Rule: <\/span>
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\nChoose EP-BABR<\/strong> when: (1) the machine structure requires a circular bolt pattern, (2) your required ratio is 14:1 or 20:1 single-stage, or (3) two-stage ratio above 100:1 is needed. Choose EP-BAB<\/strong> when: standard square-flange mounting simplifies your machine design and ratio \u2264100:1 is sufficient.
\n<\/span><\/div>\n<\/section>\n

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EP-BABR042 to EP-BABR220 \u2014 Complete Planetary Gearbox Specifications<\/h2>\n

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\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Common Specifications \u2014 All EP-BABR Frames<\/th>\n<\/tr>\n<\/thead>\n
\u53cd\u51b2 P1<\/td>\n\u5355\u7ea7\u22643\u5f27\u5206\uff1b\u4e24\u7ea7\u22645\u5f27\u5206<\/td>\n<\/tr>\n
\u53cd\u51b2 P2<\/td>\nSingle-stage \u22648 arcmin \u00b7 Two-stage \u226412 arcmin<\/td>\n<\/tr>\n
\u5355\u7ea7\u6bd4\u7387<\/td>\n3, 4, 5, 6, 7, 8, 9, 10, 14, 20<\/strong> (extended vs EP-BAB)<\/td>\n<\/tr>\n
\u4e24\u9636\u6bb5\u6bd4\u7387<\/td>\n15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 120, 140, 160, 180, 200<\/strong><\/td>\n<\/tr>\n
\u6548\u7387<\/td>\nSingle-stage \u226595% \u00b7 Two-stage \u226592%<\/td>\n<\/tr>\n
Noise (3,000 rpm, no-load, 1 m)<\/td>\n<65 dB(A)<\/td>\n<\/tr>\n
Peak Torque (Emergency Stop)<\/td>\n3\u00d7 Rated Output Torque (instantaneous)<\/td>\n<\/tr>\n
Max Acceleration Torque<\/td>\n60% of Rated Torque (T\u2082s = 0.6 \u00d7 T\u2082Nor)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0 \u00b0C to +40 \u00b0C<\/td>\n<\/tr>\n
Output Shaft<\/td>\nS1: Smooth shaft \u00b7 S2: With keyway<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Rated Output Torque (N\u00b7m) \u2014 Key Ratios Across All Frames<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u6bd4\u7387<\/th>\n\u9636\u6bb5<\/th>\nBABR042<\/th>\nBABR060<\/th>\nBABR090<\/th>\nBABR115<\/th>\nBABR142<\/th>\nBABR180<\/th>\nBABR220<\/th>\n<\/tr>\n<\/thead>\n
3<\/td>\n1-stg<\/td>\n9<\/td>\n36<\/td>\n90<\/td>\n195<\/td>\n342<\/td>\n588<\/td>\n1,140<\/td>\n<\/tr>\n
5<\/td>\n1-stg<\/td>\n15<\/td>\n60<\/td>\n\u2014<\/td>\n325<\/td>\n650<\/td>\n1,200<\/td>\n2,000<\/td>\n<\/tr>\n
10<\/td>\n1-stg<\/td>\n4<\/td>\n60<\/td>\n10<\/td>\n325<\/td>\n650<\/td>\n1,200<\/td>\n2,000<\/td>\n<\/tr>\n
14 \u2605<\/td>\n1-stg<\/td>\n\u2014<\/td>\n42<\/td>\n14<\/td>\n300<\/td>\n550<\/td>\n1,100<\/td>\n1,800<\/td>\n<\/tr>\n
20 \u2605<\/td>\n1-stg<\/td>\n\u2014<\/td>\n40<\/td>\n10<\/td>\n230<\/td>\n450<\/td>\n\u2014<\/td>\n1,500<\/td>\n<\/tr>\n
25<\/td>\n2-stg<\/td>\n15<\/td>\n60<\/td>\n150<\/td>\n325<\/td>\n650<\/td>\n1,200<\/td>\n2,000<\/td>\n<\/tr>\n
50<\/td>\n2-stg<\/td>\n14<\/td>\n60<\/td>\n100<\/td>\n230<\/td>\n650<\/td>\n1,200<\/td>\n2,000<\/td>\n<\/tr>\n
120 \u2605<\/td>\n2-stg<\/td>\n\u2014<\/td>\n\u2014<\/td>\n\u2014<\/td>\n\u2014<\/td>\n\u2014<\/td>\n\u2014<\/td>\n\u53ef\u7528\u7684<\/td>\n<\/tr>\n
200 \u2605<\/td>\n2-stg<\/td>\n\u2014<\/td>\n\u2014<\/td>\n\u2014<\/td>\n\u2014<\/td>\n\u2014<\/td>\n\u2014<\/td>\n\u53ef\u7528\u7684<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u2605 = Exclusive to EP-BABR series \u2014 not available in the square-flange EP-BAB model. Contact Korea Ever-Power for full torque data at ratios 120\u2013200.<\/p>\n

<\/p>\n

Maximum Rated Input Speed (RPM) by Frame<\/h3>\n
\n\n\n\n\n\n
\u6846\u67b6<\/th>\n042<\/th>\n060<\/th>\n090<\/th>\n115<\/th>\n142<\/th>\n180<\/th>\n220<\/th>\n<\/tr>\n<\/thead>\n
Max RPM<\/td>\n5,000<\/td>\n5,000<\/td>\n5,000<\/td>\n4,000<\/td>\n4,000<\/td>\n3,000<\/td>\n2,000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\"BABR \"BABR<\/p>\n

<\/p>\n

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Two Engineering Advantages Unique to EP-BABR<\/h2>\n

\"BABR<\/p>\n

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<\/p>\n

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\u2460<\/span>
\nRound Flange \u2014 Symmetric Load Distribution<\/h3>\n

The circular bolt-circle of EP-BABR distributes the clamping and reaction torque load symmetrically around the output shaft centreline. In square-flange designs, the four corner bolts are at unequal distances from the shaft axis, creating uneven bolt tension under high-torque reversals. The round flange’s equidistant bolt pattern eliminates this asymmetry \u2014 particularly significant in the larger EP-BABR180 and EP-BABR220 frames where output torques up to 2,000 N\u00b7m would generate measurable flange deflection in asymmetric arrangements.<\/p>\n

Round flanges also mount naturally into cylindrical housings and rotary joint cartridges \u2014 the mechanical format used in Korean collaborative robot joint modules, precision rotary stages, and hollow-shaft actuator assemblies where the gearbox body is inserted from one end of a tubular machine column.<\/p>\n<\/div>\n

<\/p>\n

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\u2461<\/span>
\nExtended Ratios \u2014 Single-Stage to 20:1, Two-Stage to 200:1<\/h3>\n

The standard planetary gear train achieves single-stage ratios up to 10:1 by constraining the ring gear and driving the planet carrier. BABR’s extended single-stage ratios of 14:1 and 20:1 are achieved through a modified planet gear configuration that increases the ratio without adding a second stage \u2014 preserving the compact axial length of single-stage while covering an intermediate ratio range that previously required a two-stage unit.<\/p>\n

Two-stage 200:1 enables a 3,000 rpm servo motor to drive an output axis at just 15 rpm<\/strong> within a single gearbox \u2014 eliminating the third reduction stage that would otherwise add housing length, cost, and backlash accumulation. For slow-speed positioning axes in automated guided vehicles, rotary kilns, and architectural shading drives, this is a decisive specification advantage over the 100:1 maximum of the square-flange model.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Model Designation Guide \u2014 EP-BABR Part Number<\/h2>\n
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EP-BABR 090 \/ 20 \/ S2 \/ P1 \/ T1<\/div>\n
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EP-BABR<\/div>\n
\u97e9\u56fd\u6c38\u529b
\nRound Flange Series<\/div>\n<\/div>\n
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090<\/div>\n
Housing diameter
\n90 mm<\/div>\n<\/div>\n
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20<\/div>\n
Gear ratio i=20:1
\n(single-stage exclusive)<\/div>\n<\/div>\n
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S2<\/div>\n
\u8f93\u51fa\u8f74
\nwith keyway<\/div>\n<\/div>\n
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P1<\/div>\n
Precision grade
\n\u22643 arcmin<\/div>\n<\/div>\n
\n
T1<\/div>\n
Input flange type
\n(motor-matched)<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n
Position<\/th>\nCode<\/th>\nMeaning<\/th>\n<\/tr>\n<\/thead>\n
\u7cfb\u5217<\/td>\nEP-BABR<\/td>\nKorea Ever-Power, round circular-flange output<\/td>\n<\/tr>\n
Frame Size<\/td>\n042\/060\/090\/115\/142\/180\/220<\/td>\nHousing diameter in mm<\/td>\n<\/tr>\n
Gear Ratio<\/td>\n3\u201310, 14, 20 \/ 15\u2013200<\/td>\nSingle-stage: 3~10, 14, 20 \u00b7 Two-stage: 15~200 (including 120, 140, 160, 180, 200)<\/td>\n<\/tr>\n
Output Shaft<\/td>\nS1 \/ S2<\/td>\nS1: Smooth \u00b7 S2: With keyway<\/td>\n<\/tr>\n
Backlash Grade<\/td>\nP1 \/ P2<\/td>\nP1: \u22643’\/\u22645′ (single\/two-stage) \u00b7 P2: \u22648’\/\u226412′<\/td>\n<\/tr>\n
Input Flange<\/td>\nT1 \/ T2<\/td>\nSpecify servo motor model for matched adapter plate<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

\"Series<\/p>\n

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Applications Where Round Flange and Extended Ratio Determine the Choice<\/h2>\n
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Collaborative Robot (Cobot) Joint Modules<\/h3>\n

Korean cobot manufacturers building ISO\/TS 15066-compliant human-collaborative robots use a precision planetary gearbox in each joint module as cylindrical cartridges inserted into tubular arm link sections. The round flange of EP-BABR allows direct insertion and bolt-circle clamping against the link bore shoulder \u2014 eliminating the adapter bracket that a square-flange gear reducer would require, saving 15\u201325 mm of axial length per joint and removing a mechanical interface from the backlash chain. EP-BABR090 at 20:1 single-stage is a common specification for cobot elbow joints where compact length is the dominant mechanical constraint.<\/p>\n<\/div>\n

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AGV Steering Axes (200:1 Two-Stage)<\/h3>\n

Automated guided vehicle (AGV) steering actuators drive the wheel pivot from a servo motor at 3,000 rpm down to approximately 15\u201320 rpm for smooth, controllable steering angle changes. EP-BABR at 200:1 two-stage achieves this in a single sealed planetary gearbox without the noise, oil-change maintenance, and efficiency losses of a worm gear stage that conventional AGV steering drives add as a second unit. Pairs with CV drive shafts<\/a> where AGV wheel offset requires flexible shaft couplings.<\/p>\n<\/div>\n

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Hollow-Shaft Rotary Actuators & Indexing Tables<\/h3>\n

Precision rotary indexing tables and hollow-shaft actuators \u2014 where cables, pneumatic lines, or optical fibres pass through the centre of the rotating axis \u2014 require a gearbox output flange that integrates into a hollow bore arrangement. EP-BABR’s circular flange bolts directly to hollow-shaft bearing housings with the bolt circle concentric to the through-bore, while a square-flange design would require an eccentric mounting adapter that shifts the through-bore away from the machine centreline.<\/p>\n<\/div>\n<\/div>\n

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Application Quick Reference<\/h3>\n